var http = require("http"),
	url  = require("url"),
	path = require("path"),
	fs   = require("fs");

http.createServer(function (req, res) {
	var pathname=__dirname+url.parse(req.url).pathname;
	if (path.extname(pathname)=="") {
		pathname+="/";
	}
	if (pathname.charAt(pathname.length-1)=="/"){
		pathname+="index.html";
	}

	fs.exists(pathname,function(exists){
		if(exists){
			switch(path.extname(pathname)){
				case ".html":
					res.writeHead(200, {"Content-Type": "text/html"});
					break;
				case ".js":
					res.writeHead(200, {"Content-Type": "text/javascript"});
					break;
				case ".css":
					res.writeHead(200, {"Content-Type": "text/css"});
					break;
				case ".gif":
					res.writeHead(200, {"Content-Type": "image/gif"});
					break;
				case ".jpg":
					res.writeHead(200, {"Content-Type": "image/jpeg"});
					break;
				case ".png":
					res.writeHead(200, {"Content-Type": "image/png"});
					break;
				default:
					res.writeHead(200, {"Content-Type": "application/octet-stream"});
			}

			fs.readFile(pathname,function (err,data){
				res.end(data);
			});
		} else {
			res.writeHead(404, {"Content-Type": "text/html"});
			res.end("<h1>404 Not Found</h1>");
		}
	});

}).listen(8081);

console.log("Server running at http://127.0.0.1:8081/");
